Sound production device and electronic device

Abstract

The utility model belongs to electroacoustic conversion technical field, and concretely relates to a sound production device and electronic equipment, the sound production device includes the shell and accomodates the vibration system in the shell, and the vibration system includes the diaphragm subassembly, the voice coil and the framework, the outer periphery of diaphragm subassembly is connected in the shell, the main part of framework is annularly arranged and has the opposite first side and second side, the first side is connected with diaphragm subassembly, the second side is equipped with the boss that is spaced apart along the circumference of main part, and the clearance is between the adjacent two bosses, and the boss extends towards the direction away from diaphragm subassembly relative to the second side, the top of voice coil is connected in the boss, and the top of voice coil and clearance form the air hole that surrounds. The utility model exports the heat generated in the inside of voice coil to the outside of voice coil through the setting air hole due to the electrification, and then is favorable to the heat export to the outside of sound production device, thereby is favorable to the reliability of sound production device, improves the service life of sound production device.

Description

Technical Field

[0001] This utility model belongs to the field of electroacoustic conversion technology, and specifically relates to a sound-generating device and electronic equipment. Background Technology

[0002] In recent years, with the development of technology, the volume required by electronic products has been increasing. Correspondingly, the amplitude requirements for the sound-generating devices in electronic products are becoming increasingly stringent. Since the amplitude is positively correlated with the voice coil current, the voice coil current is also increasing. This increase in voice coil current inevitably generates more heat. Given the limited size of the sound-generating device, if the heat generated during voice coil operation cannot be dissipated in time, it will inevitably affect the lifespan of the sound-generating device. Therefore, to address these shortcomings, this utility model is proposed. Utility Model Content

[0003] The purpose of this invention is to provide a sound-generating device and an electronic device to at least partially solve the above-mentioned technical problems.

[0004] The first aspect of this utility model provides a sound-generating device, including a housing and a vibration system housed within the housing. The vibration system includes a diaphragm assembly, a voice coil, and a frame. The outer periphery of the diaphragm assembly is connected to the housing. The main body of the frame is arranged in a ring shape and has opposing first and second sides. The first side is connected to the diaphragm assembly, and the second side has protrusions spaced circumferentially along the main body. There is a gap between two adjacent protrusions, and the protrusions extend away from the diaphragm assembly relative to the second side. The top of the voice coil is connected to the protrusions, and the top of the voice coil and the gap enclose a vent hole.

[0005] The sound-generating device provided by this utility model may also have the following additional technical features:

[0006] In one specific embodiment of this utility model, the main body has a square structure, and the main body includes a first connecting edge and a second connecting edge that connects the ends. A plurality of protrusions are symmetrically arranged with respect to the central axis of the first connecting edge, or a plurality of protrusions are symmetrically arranged with respect to the central axis of the second connecting edge, or a plurality of protrusions are symmetrically arranged with respect to the center of the main body.

[0007] And / or, the number of the bosses is at least two.

[0008] In one specific embodiment of this utility model, along the circumferential direction of the main body, the sum of the extension lengths of the vent holes is L1, the circumference of the main body is L2, and 1 / 3≤L1 / L2≤2 / 3.

[0009] In one specific embodiment of this utility model, a centering support plate is further included, which is arranged circumferentially along the voice coil; the outer periphery of the main body is folded toward the centering support plate to form a connecting foot, one end of the centering support plate is connected to the connecting foot, and the other end is connected to the housing.

[0010] In one specific embodiment of this utility model, the centering support includes a first centering support and a second centering support with an internal electrical connection portion. A lead wire groove is provided on the connecting foot corresponding to the second centering support. The lead wire of the voice coil is guided through the lead wire groove and connected to the electrical connection portion. A fixing adhesive is provided in the lead wire groove to fix the lead wire in the lead wire groove.

[0011] In one specific embodiment of this utility model, the connecting foot is provided with at least two spaced reinforcing ribs, the connecting foot has a first surface and a second surface arranged opposite to each other, and the reinforcing ribs are recessed from the first surface to the second surface so that a lead wire groove is formed between two adjacent reinforcing ribs.

[0012] And / or, the main body is formed into a square structure, and the connecting feet are four in number and are respectively located at the four corners of the main body.

[0013] In one specific embodiment of this utility model, the centering support includes an outer fixing part, a cantilever part, and an inner fixing part. The outer fixing part is fixedly connected to the housing. The two ends of the cantilever part are respectively connected to the outer fixing part and the inner fixing part. The inner fixing part is connected to the connecting foot. Along the vibration direction of the vibration system, a portion of the cantilever part is opposite to the housing to form a first cantilever. The housing is provided with an avoidance groove opposite to the first cantilever.

[0014] In one specific embodiment of this utility model, a magnetic circuit system is also included. The magnetic circuit system includes a central magnetic part and a side magnetic part surrounding the central magnetic part. A magnetic gap corresponding to the voice coil is provided between the central magnetic part and the side magnetic part. The side magnetic part is formed into a square structure and has four corners. A centering support is provided on the outside of the corresponding corner. The connecting foot extends to the outside of the corner and is connected to the centering support.

[0015] In one specific embodiment of the present invention, the skeleton further includes a reinforcing part, which is located circumferentially inside the main body and its two ends are respectively connected to the main body.

[0016] A second aspect of this utility model also provides an electronic device, including any of the sound-generating devices described above.

[0017] The sound-generating device provided by this utility model features a frame with a boss and a gap, and a voice coil connected to the boss, which, together with the gap, forms a vent. When the sound-generating device is working, i.e., when the voice coil is conductive, it vibrates within the magnetic gap under the influence of a magnetic field, thereby driving the diaphragm assembly to vibrate and produce sound. Simultaneously, because the voice coil and frame form a vent, this vent connects the inner and outer sides of the voice coil, allowing heat generated inside the voice coil due to current to be dissipated to the outer side. This facilitates heat dissipation to the outside of the sound-generating device, thereby improving its reliability and extending its service life. Attached Figure Description

[0018] To more clearly illustrate the specific embodiments of this utility model or the technical solutions in the prior art, the drawings used in the description of the specific embodiments or the prior art will be briefly introduced below. Obviously, the drawings described below are some embodiments of this utility model. For those skilled in the art, other drawings can be obtained from these drawings without creative effort.

[0019] Figure 1 This is an exploded view of the sound-generating device in an embodiment of this utility model;

[0020] Figure 2 This is a partial structural schematic diagram of the sound-generating device in an embodiment of this utility model;

[0021] Figure 3-5 This is a schematic diagram of the skeleton structure in this utility model;

[0022] Figure 6-7 This is a schematic diagram of the connection structure between the voice coil and the frame in this utility model.

[0023] Explanation of reference numerals in the attached figures:

[0024] 100 - Sound-generating device;

[0025] 10-Shell, 11-Allowing groove;

[0026] 20-Vibration system, 11-Diaphragm assembly, 111-Diaphragm, 112-Vibrating plate, 12-Frame, 121-Main body, 122-Connecting foot, 123-Boss, 124-Leading groove, 125-Reinforcing part, 126-Reinforcing rib, 13-Voice coil, 14-Ventilation hole;

[0027] 30-Magnetic circuit system, 31-Magnetic yoke, 32-Central magnetic part, 33-Central magnet, 34-Central magnetic plate, 35-Side magnetic part, 36-Side magnet, 37-Side magnetic plate;

[0028] 40-Centering support, 41-External fixation part, 42-Cantilever part, 43-Internal fixation part, 44-First centering support, 45-Second centering support. Detailed Implementation

[0029] Exemplary embodiments of the present invention will now be described in more detail with reference to the accompanying drawings. While exemplary embodiments of the present invention are shown in the drawings, it should be understood that the present invention may be implemented in various forms and should not be limited to the embodiments set forth herein. Rather, these embodiments are provided so that this invention will be thorough and complete, and will fully convey the scope of the invention to those skilled in the art.

[0030] It should be understood that the terminology used herein is for the purpose of describing particular exemplary embodiments only and is not intended to be limiting. Unless the context clearly indicates otherwise, the singular forms “a,” “an,” and “described” as used herein may also include the plural forms. The terms “comprising,” “including,” “containing,” and “having” are inclusive and therefore indicate the presence of the stated features, steps, operations, elements, and / or components, but do not exclude the presence or addition of one or more other features, steps, operations, elements, components, and / or combinations thereof. The method steps, processes, and operations described herein are not construed as requiring them to be performed in a particular order described or illustrated unless the order of performance is explicitly indicated. It should also be understood that additional or alternative steps may be used.

[0031] Although terms such as first, second, third, etc., may be used in this document to describe multiple elements, components, regions, layers, and / or segments, these elements, components, regions, layers, and / or segments should not be limited by these terms. These terms may be used only to distinguish one element, component, region, layer, or segment from another. Unless the context clearly indicates otherwise, terms such as "first," "second," and other numerical terms used herein do not imply order or sequence. Therefore, the first element, component, region, layer, or segment discussed below may be referred to as the second element, component, region, layer, or segment without departing from the teachings of the exemplary embodiments.

[0032] For ease of description, spatial relative terms may be used in the text to describe the relationship of one element or feature relative to another element or feature, as shown in the figure. These relative terms include, for example, "inside," "outside," "middle," "outer," "below," "below," "above," "over," etc. Such spatial relative terms are intended to include different orientations of the device in use or operation, other than those depicted in the figure. For example, if the device in the figure is flipped, an element described as "below other elements or features" or "below other elements or features" would subsequently be oriented as "above other elements or features" or "above other elements or features." Therefore, the example term "below" can include both upper and lower orientations. The device may be otherwise oriented (rotated 90 degrees or in other directions), and the spatial relative descriptors used in the text will be interpreted accordingly.

[0033] This utility model provides a sound-generating device 100 and an electronic device including the sound-generating device 100. The sound-generating device 100 can effectively discharge the airflow inside the voice coil 13 under the condition of limited structural size, so that the airflow is smoother and the heat of the voice coil 13 is dissipated smoothly, thereby extending the service life of the sound-generating device 100 and the electronic device.

[0034] Reference Figures 1-7 The present invention provides a sound-generating device 100 including a housing 10 and a vibration system 20 housed in the housing 10. The vibration system 20 includes a diaphragm assembly 11, a voice coil 13, and a frame 12. The outer periphery of the diaphragm assembly 11 is connected to the housing 10. The main body 121 of the frame 12 is arranged in a ring shape and has a first side and a second side opposite to each other. The first side is connected to the diaphragm assembly 11, and the second side is provided with bosses 123 spaced apart circumferentially along the main body 121. There is a gap between two adjacent bosses 123. The bosses 123 extend away from the diaphragm assembly 11 relative to the second side. The top of the voice coil 13 is connected to the bosses 123, and the top of the voice coil 13 and the gap enclose a vent hole 14.

[0035] Specifically, the shell 10 is formed as a hollow frame structure, and the shell 10 can be made of metal or plastic.

[0036] In the vibration system 20, the outer periphery of the diaphragm assembly 11 is connected to one side of the housing 10. The frame 12 includes a main body 121, which is annularly arranged and has a shape approximately the same as that of the housing 10. The main body 121 has a first side and a second side opposite to each other. The first side is connected to the inner side of the diaphragm assembly 11 facing the housing 10. The second side is provided with bosses 123 spaced apart circumferentially along the main body 121. The surface of the bosses 123 is planar, and there is a gap between adjacent bosses 123. The top of the voice coil 13 is connected to the bosses 123. Optionally, the bosses 123 can be recessed from the first side to the second side. Of course, other molding methods can also be used, such as injection molding on the second side of the main body 121. The voice coil 13 is annularly arranged, and its axial top is connected to the bosses 123 of the frame 12. The gap between the voice coil 13 and the bosses 123 forms a vent hole 14.

[0037] The sound-generating device 100 also includes a magnetic circuit system 30 connected to the outer periphery of the housing 10. The magnetic circuit system 30 has a magnetic gap corresponding to the voice coil 13 and is adapted to provide a magnetic field for the voice coil 13. The bottom of the voice coil 13 can be inserted into the magnetic gap, or the bottom of the voice coil 13 can be located on one side of the magnetic gap and opposite to the magnetic gap.

[0038] Based on the above configuration, when the sound-generating device 100 is working, i.e., when the voice coil 13 is conductive, it can vibrate under the influence of a magnetic field. During this process, since the voice coil 13 and the frame 12 enclose and form a vent 14, the vent 14 can connect the inner and outer sides of the voice coil 13. Thus, the heat generated on the inner side of the voice coil 13 due to the electrical conduction is dissipated to the outer side of the voice coil 13 through the gas flow in the vent 14. This facilitates the dissipation of heat to the outside of the sound-generating device 100, thereby improving the reliability and service life of the sound-generating device 100.

[0039] In some embodiments, the main body 121 has a square structure and includes a first connecting edge and a second connecting edge that are connected end to end. A plurality of protrusions 123 are symmetrically arranged with respect to the central axis of the first connecting edge, or a plurality of protrusions 123 are symmetrically arranged with respect to the central axis of the second connecting edge, or a plurality of protrusions 123 are symmetrically arranged with respect to the center of the main body 121.

[0040] Specifically, the housing 10 is roughly square, and the main body 121 of the frame 12 has a shape roughly the same as the housing 10, is also oriented, and is specifically formed by two first connecting edges and two second connecting edges connected end to end. By setting the multiple bosses 123 as an axisymmetric or centrosymmetric structure, the balance of the voice coil 13 can be improved, thereby reducing the polarization of the voice coil 13.

[0041] Of course, in some embodiments, the boss 123 may also be asymmetrically arranged. In this case, the vent hole 14 may correspond to the vent structure of the sound-generating device.

[0042] In some embodiments, the number of bosses 123 is at least two. Thus, the number of vents 14 is at least two, which helps to improve the smoothness of airflow and thus facilitates the dissipation of heat from the voice coil 13.

[0043] Of course, in other embodiments, the number of bosses 123 can also be 3, 4, 5, etc., which is not limited here, and can be set according to actual needs.

[0044] In some embodiments, the sum of the extension lengths of the vent holes 14 along the circumferential direction of the main body 121 is L1, and the circumference of the main body 121 is L2, where 1 / 3 ≤ L1 / L2 ≤ 2 / 3. It should be noted that when the extension length of the vent holes 14 is too small, the airflow inside the voice coil 13 is not smooth, affecting the heat dissipation effect. When the extension length of the vent holes 14 is too large, the contact area between the voice coil 13 and the boss 123 becomes smaller, affecting the connection strength between the voice coil 13 and the frame 12. When 1 / 3 ≤ L1 / L2 ≤ 2 / 3, both the connection strength between the voice coil 13 and the frame 12 and the smoothness of airflow in the vent holes are ensured.

[0045] Specifically, L1 / L2 can be 0.35, 0.4, 0.5, 0.6, 0.65, etc., and the specific value can be determined based on simulation.

[0046] In some embodiments, a centering support plate 40 is also included. The centering support plate 40 is arranged circumferentially along the voice coil 13. The outer periphery of the main body 121 is folded toward the centering support plate 40 to form a connecting foot 122. One end of the centering support plate 40 is connected to the connecting foot 122, and the other end is connected to the housing 10.

[0047] Specifically, the centering support 40 is located at the bottom or the outer periphery of the bottom of the voice coil 13. A connecting foot 122 is provided on the frame 12, and the connecting foot 122 is connected to the centering support 40. This can improve the balance of the voice coil 13, thereby reducing the polarization of the voice coil 13 and thus improving the reliability margin of the sound-generating device 100.

[0048] In some embodiments, the centering support 40 includes a first centering support 44 and a second centering support 45 with an internal electrical connection portion. A lead wire groove 124 is provided on the connecting foot 122 corresponding to the second centering support 45. The lead wire of the voice coil 13 is disposed in the lead wire groove 124 and guided through the lead wire groove 124 to connect with the electrical connection portion. A fixing adhesive is provided in the lead wire groove 124 to fix the lead wire in the lead wire groove 124.

[0049] Specifically, the first centering support 44 is used to improve the balance of the voice coil 13, and the second centering support 45 is not only used to improve the balance of the voice coil 13, but also to introduce external power into the voice coil 13 through the internal electrical connection part to realize the energization of the voice coil 13. Specifically, by providing a lead wire groove 124 extending along the vibration direction on the connecting foot 122 corresponding to the second centering support 45, the lead wire located at the top of the voice coil 13 can be fixed in the lead wire groove 124 with fixing adhesive, so that the lead wire is guided through the lead wire groove 124 to the electrical connection part of the second centering support 45 for electrical connection.

[0050] In this embodiment, a lead wire groove 124 is provided on the connecting foot 122 corresponding to the second centering support 45. This groove 124 fixes and guides the lead wire of the voice coil 13, preventing it from unraveling due to vibration and further improving the stability of the voice coil 13. Furthermore, this arrangement allows for a more compact fit between the voice coil 13 lead wire and the frame 12, preventing wire breakage during vibration of the vibration system 20 due to collisions between the voice coil 13 lead wire and other components.

[0051] In some embodiments, the connecting foot 122 is provided with at least two spaced reinforcing ribs 126, the connecting foot 122 has a first surface and a second surface disposed opposite to each other, and the reinforcing ribs 126 are recessed from the first surface to the second surface so that a lead groove 124 is formed between two adjacent reinforcing ribs 126.

[0052] Specifically, the side of the connecting foot 122 facing away from the voice coil 13 is the first side, and the side of the connecting foot 122 facing the voice coil 13 is the second side. Both sides of the first side are recessed towards the second side to form reinforcing ribs 126, thereby further improving the strength of the connecting foot 122. The non-recessed position between the two reinforcing ribs 126 of the same connecting foot 122 forms a groove, which is the lead groove 124.

[0053] This embodiment, through the above-described configuration, not only improves the strength of the connecting pin 122, thereby enhancing its connection stability, but also facilitates the formation of the lead groove 124, enabling multiple functions to be achieved in a single processing step. Furthermore, compared to directly processing the lead groove 124, the method of forming the lead groove 124 by processing the reinforcing rib 126 is simpler and easier to implement, thus further improving production efficiency.

[0054] In some embodiments, the main body 121 is formed into a square structure, and there are four connecting feet 122 located at the four corners of the main body 121.

[0055] Specifically, there are four centering support plates 40, including two first centering support plates 44 and two second centering support plates 45. The two first centering support plates 44 are located at the two corners of the same end of the housing 10, and the two second centering support plates 45 are located at the two corners of the other end of the housing 10. Correspondingly, there are four connecting feet 122, which are located at the four corners of the main body 121 to correspond to the centering support plates 40. This can improve the connection strength between the frame 12 and the centering support plates 40, thereby improving the operational stability of the vibration system 20.

[0056] In some embodiments, the centering support 40 includes an outer fixing part 41, a cantilever part 42, and an inner fixing part 43. The outer fixing part 41 is fixedly connected to the housing 10. The two ends of the cantilever part 42 are respectively connected to the outer fixing part 41 and the inner fixing part 43. The inner fixing part 43 is connected to the connecting foot 122. Along the vibration direction of the vibration system 20, a portion of the cantilever part 42 is opposite to the housing 10 to form a first cantilever. The housing 10 is provided with a relief groove 11 that is opposite to the first cantilever.

[0057] Specifically, because the second centering support 45 has an internal electrical connection, there is a difference in stiffness between the second centering support 45 and the first centering support 44, resulting in a difference in amplitude. In this embodiment, a clearance groove 11 is provided on the housing 10 to extend the cantilever portion 42 of the centering support 40 to the housing 10, thereby increasing the length of the cantilever portion 42. This allows for adjustment of the cantilever lengths of the two centering supports 40, thus improving the polarization phenomenon of the voice coil 13. Furthermore, this arrangement reduces stress concentration on the centering support 40, preventing breakage and meeting the large-amplitude vibration requirements of the vibration system 20.

[0058] In some embodiments, the magnetic circuit system 30 includes a central magnetic part 32 and a side magnetic part 35 surrounding the central magnetic part 32. A magnetic gap is provided between the central magnetic part 32 and the side magnetic part 35. The side magnetic part 35 is formed into a square structure and has four corners. A centering support plate 40 is provided on the outside of the corresponding corner. A connecting foot 122 extends to the outside of the corner and is connected to the centering support plate 40.

[0059] Specifically, the magnetic circuit system 30 includes a magnetic yoke 31 connected to the second side of the housing 10, and a central magnetic part 32 and a side magnetic part 35 disposed on the same side of the magnetic yoke 31. The side magnetic part 35 is arranged around the central magnetic part 32 to form a magnetic gap.

[0060] The central magnetic section 32 includes a central magnet 33 and a central magnetic guide plate 34. The central magnet 33 is disposed on the magnetic yoke 31. The central magnetic guide plate 34 has a roughly the same outer contour as the central magnet 33 and is stacked on top of the central magnet 33. The side magnetic section 35 includes a side magnet 36 and a side magnetic guide plate 37. The side magnet 36 is square in shape and can be composed of a single ring magnet or multiple strip magnets arranged end to end. The side magnetic guide plate 37 can be formed as an integral structure or as a separate structure and is stacked on top of the side magnet 36. Optionally, the magnetic guide plate and the housing 10 are integrally injection molded structures.

[0061] The side magnetic portion 35 has four corner portions corresponding to the corners of the housing 10, and each corner portion is recessed towards the central magnetic portion 32 to form a clearance groove 11. The centering support plate 40 is located on the outer side of the corresponding corner portion, and the connecting foot 122 of the frame 12 extends to the clearance groove 11 and connects to the inner fixing portion 43 of the centering support plate 40. Thus, the centering support plate 40 is located on the outer side of the side magnetic portion 35, and the side magnetic portion 35 can be formed into a closed ring structure without leaving installation space for the centering support plate 40. This increases the B value of the magnetic circuit system 30, thereby improving the BL of the product and enhancing the sound-generating sensitivity of the sound-generating device 100.

[0062] In some embodiments, the skeleton 12 further includes a reinforcing portion 125, which is located circumferentially inside the main body portion 121 and whose two ends are respectively connected to the main body portion 121.

[0063] Specifically, the reinforcing part 125 can be arranged in a strip shape, or in a cross shape or a star shape. It is located inside the main body 121 and its end is connected to the main body 121. The reinforcing part 125 can improve the structural strength of the frame 12.

[0064] This embodiment improves the deformation resistance of the skeleton 12 through the above-described settings, thereby increasing the strength of the skeleton 12 and further improving the deformation resistance of the voice coil 13 connected to it.

[0065] In some embodiments, the diaphragm assembly 11 includes a diaphragm 11 with a folded ring portion and a vibrating plate 112 connected to the center of the diaphragm 11, and the main body portion 121 of the frame 12 is connected to the vibrating plate 112.

[0066] The second aspect of this utility model also provides an electronic device, including a sound-generating device 100 as described above. The structure of the sound-generating device 100 is as described in the above embodiments. Since the electronic device in this embodiment includes the sound-generating device 100 in all the above embodiments, it also has at least all the beneficial effects of the sound-generating device 100, which will not be described in detail here. Optionally, the electronic device can be a mobile phone, tablet, headphones, smart wearable device, etc.

[0067] Finally, it should be noted that the above embodiments are only used to illustrate the technical solutions of this utility model, and are not intended to limit it. Although the utility model has been described in detail with reference to the foregoing embodiments, those skilled in the art should understand that modifications can still be made to the technical solutions described in the foregoing embodiments, or equivalent substitutions can be made to some or all of the technical features therein. Such modifications or substitutions do not cause the essence of the corresponding technical solutions to deviate from the scope of the technical solutions of the embodiments of this utility model.

Claims

1. A sound-generating device, characterized in that, The device includes a housing and a vibration system housed within the housing. The vibration system includes a diaphragm assembly, a voice coil, and a frame. The outer periphery of the diaphragm assembly is connected to the housing. The main body of the frame is annularly arranged and has opposing first and second sides. The first side is connected to the diaphragm assembly, and the second side has protrusions spaced circumferentially along the main body. There is a gap between two adjacent protrusions, and the protrusions extend away from the diaphragm assembly relative to the second side. The top of the voice coil is connected to the protrusions, and the top of the voice coil and the gap enclose a vent hole.

2. The sound-generating device according to claim 1, characterized in that, The main body has a square structure. The main body includes a first connecting edge and a second connecting edge that connects the ends. A plurality of protrusions are symmetrically arranged with respect to the central axis of the first connecting edge, or a plurality of protrusions are symmetrically arranged with respect to the central axis of the second connecting edge, or a plurality of protrusions are symmetrically arranged with respect to the center of the main body. And / or, the number of the bosses is at least two.

3. The sound-generating device according to claim 1, characterized in that, Along the circumferential direction of the main body, the sum of the extension lengths of the vent holes is L1, the perimeter of the main body is L2, and 1 / 3≤L1 / L2≤2 / 3.

4. The sound-generating device according to claim 1, characterized in that, It also includes a centering support plate, which is arranged circumferentially along the voice coil; the outer periphery of the main body is folded toward the centering support plate to form a connecting foot, one end of the centering support plate is connected to the connecting foot, and the other end is connected to the housing.

5. The sound-generating device according to claim 4, characterized in that, The centering support includes a first centering support and a second centering support with an internal electrical connection portion. A lead wire groove is provided on the connecting foot corresponding to the second centering support. The lead wire of the voice coil is guided through the lead wire groove and connected to the electrical connection portion. A fixing adhesive is provided in the lead wire groove to fix the lead wire in the lead wire groove.

6. The sound-generating device according to claim 5, characterized in that, The connecting foot is provided with at least two spaced reinforcing ribs. The connecting foot has a first surface and a second surface that are disposed opposite to each other. The reinforcing ribs are recessed from the first surface to the second surface so that a lead wire groove is formed between two adjacent reinforcing ribs. And / or, the main body is formed into a square structure, and the connecting feet are four in number and are respectively located at the four corners of the main body.

7. The sound-generating device according to claim 4, characterized in that, The centering support includes an outer fixing part, a cantilever part, and an inner fixing part. The outer fixing part is fixedly connected to the housing. The two ends of the cantilever part are respectively connected to the outer fixing part and the inner fixing part. The inner fixing part is connected to the connecting foot. Along the vibration direction of the vibration system, a portion of the cantilever part is opposite to the housing to form a first cantilever. The housing is provided with a clearance groove that is opposite to the first cantilever.

8. The sound-generating device according to claim 4, characterized in that, It also includes a magnetic circuit system, which includes a central magnetic part and a side magnetic part surrounding the central magnetic part. A magnetic gap corresponding to the voice coil is provided between the central magnetic part and the side magnetic part. The side magnetic part is formed into a square structure and has four corners. The centering support is located on the outside of the corresponding corner. The connecting foot extends to the outside of the corner and connects to the centering support.

9. The sound-generating device according to any one of claims 1-8, characterized in that, The frame also includes a reinforcing part, which is located circumferentially inside the main body and its two ends are respectively connected to the main body.

10. An electronic device, characterized in that, Includes the sound-generating device according to any one of claims 1-9.

Images